UROPYGIUM Meaning of UROPYGIUM in English [uro.py.gi.um] n [NL, fr. Gk ouropygion, fr. ouro- [2]ur- + pyge rump] (1771): the fleshy and bony prominence at the posterior extremity of a bird's body that supports the tail feathers Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012